FLOKA OK 11 IK SHASTA FORMATION. 273 



2. Sagenopteris ('lli])t ica I'Diil. Several lair speciineiis. Those in the Kiioxville 

 occur ill the iip]ier beds. 



\'. In tlu' Kno.willc and (lie lia>e of ihe Cliico: 



Matonidiuni Allliau.-~ii (l)urd<.i \Vard. Two \ei'y iniperfecl rragnieiits. one in 

 each riirniat ion. 



It will he noticed tli;il tli('s(> plants iiidicato ({(M-idedly a Lowcm' 

 ( 'iT'tacooiis a<^o foi' tlie Shasta fofiiial ion. llic plants thai liavc hccn 

 liitlici'lo recogniz(Ml in other I'ejiions occur in widely s(>pai'ated foi-nial ions 

 of that ajie, such as the \\ ealdeu of norlheiii Jauope, the Xeoconiian of 

 Japan, the Lower Potomac, the Conianclie, and the (lical i'alls heds. 

 In the Knoxville the flora has an older character than thai of the lloi'se- 

 town, at least in the greater deficiency of younger elements, such as the 

 dicotyledons. All the dicotyledons of modern aspect chmmu- in I he upper 

 part of the Horsetown \>vds. These are, it is ti'ue, very few in numliei', 

 and imperfectly made known by the specimens obtained, but they suggest 

 tlie idea that the upper Horsetown beds are of about the same age as 

 the Aqiiia Creek beds of the Lower Potomac of \'irginia and Maryland, 

 as limited l)y Professor Ward. The Knoxville and the lower portion 

 of the Horsetown strata have a flora more like that of the .lames River 

 or lowest member of the Potomac of Virginia. The few plants from the 

 base of the Chico do not indicate any marked change from the Shasta 

 flora, but they do not suffice to give the character of the flora of the 

 basal Chico beds. 



CYCADEAN TRUNKS FROM THE SHASTA FORMATION. 



Fossil cycadean trunks have been found in the Mesozoic beds of the 

 LTnited States at many points eAsi of the Rocky Moimtains and on their 

 eastern slopes, viz, in the States of Maryland, Kansas, Colorado, South 

 Dakota, and Wyoming, but until lately their occurrence on the Pacific 

 slope had not been reported. On September 19, 1 !)()(), Dr. T. W . Stanton 

 obtained a fine and nearly perfect trunk in California. The conditions 

 under which this trimk was secured are set forth in the following note 

 which Doctor Stanton kindly furnished me at the time he turned over 

 the specimen, on November 14 of that year: 



The cycad from Colusa County, Cal., vva.s found on the ranch of Mr. B. P. Piyor, 

 in the valley of Grapevine Creek, ahout (J miles west of Sites, on tiie road to Stony 

 Ford. The specimen was in the front yard at (he ranch liou.se and Mr. Pryor .says 



MOX XLVIII — 0.5 18 



